Jenkins Setup in Docker

jenkins_docker_setup.md

Jenkins Setup Using Docker

1. Install docker

   • Locally: https://docs.docker.com/get-docker/
   • On AWS EC2: See section below
   • Remember to add the user to the docker group and re-login into the account

2. Install docker-compose

   • https://docs.docker.com/compose/install/

3. Create the jenkins home directory docker for bind mounted volume

   • mkdir ~/jenkins

4. Create docker-compose.yml

version: '3.8'
services:
  jenkins:
  image: jenkinsci/blueocean
  privileged: true
    user: root
    ports:
      - 8081:8080
      - 50000:50000
    container_name: jenkins
    volumes:
      - ~/jenkins:/var/jenkins_home
      - /var/run/docker.sock:/var/run/docker.sock
      - /usr/local/bin/docker:/usr/local/bin/docker

5. Run the docker-compose.yml file

   • docker-compose up -d

6. Get the initial setup admin password for jenkins setup

   • docker exec jenkins cat /var/jenkins_home/secrets/initialAdminPassword

7. Using web-browser navigate to localhost:8081 to finish the setup

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Note On Volume Mounts

• As stated here, named volume mounts, are easuer to back up and migrate. In order to use named volume mounts instead of bind mounts, use the following docker-compose.yml

version: '3.8'
services:
  jenkins:
    image: jenkinsci/blueocean
    privileged: true
    user: root
    ports:
      - 8081:8080
      - 50000:50000
    container_name: jenkins
    volumes:
      - jenkins-home:/var/jenkins_home
      - /var/run/docker.sock:/var/run/docker.sock
      - /usr/local/bin/docker:/usr/local/bin/docker
volumes:
  jenkins-home:

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Note On AWS EC2 Installation

• Install docker using these steps:

  • https://docs.aws.amazon.com/AmazonECS/latest/developerguide/docker-basics.html

• Remember to expose/add Security Group Inbound Rule

  • Public Access: TCP, Port 8081, from 0.0.0.0/0
  • Custom Access: TCP, Port 8081, form YOUR PUBLIC IP ADDRESS CIDR RANGE

• If you configure scuirty group inbound rule to be public, make sure to change the default admin password! If you don't people obviously will know the default jenkins admin password ...